Hi everybody. I'm trying to import Microsoft.DirectX and Microsoft.DirectX.DirectSound DLLs in my project. Here is my code.

using UnityEngine;
using System.Collections;
using Microsoft.DirectX;
using Microsoft.DirectX.DirectSound;

public class DetectSound : MonoBehaviour
{
	void Start ()
	{
		CaptureDevicesCollection devices = new CaptureDevicesCollection();
		Debug.Log("Count: "+devices.Count);
	}
}

Here is the error.

MissingMethodException: Method contains unsupported native code
Microsoft.DirectX.DirectSound.CaptureDevicesCollection..ctor ()
DetectSound.Start () (at Assets/Scripts/DetectSound.cs:10)

This code is working on Visual Studio C# 2010 and result is 2. Also I'm using Unity Pro.